H1b extension after h1b expiry and I-140 approved

Hi., I was on h1b from Oct 2004 till Dec 2010.Last h1b came without I-94 previous h1b had I-94 till Oct 2010. left USA Dec 2010. Have I-140 approved. - Is it possible to have h1b extension in india? - Can i goto usa on B1 and safely transfer B1-H1b extension? PLS HELP IN ANSWERING THESE QUES, GC priority date came and went but due to not being in USA couldn’t file for EAD.